Temperature control of kettles by zones



J. G. LEHMAN. TEMPERATURE CONTROL OF KETTLES BY ZONES. APPLICATION FILED SEPT.27, 1919.

1,407,66 Patented Feb. 21, 1922.

rarer orricn.

JOHNGEORGE LN, 01E BETHLEHEM, PENNSYLVANIA, ASSIGNOR TO BETHLEHEM FOUNDRY & MANUFACTURING COMPANY, OF BETHLEHEM, PENNSYLVANIA, A

CORPORATION OF PENNSYLVANIA.

TEMPERATURE CONTROL OF KETTLES-BY ZONES. l

Specification of Letters Patent.

Patentedll eb. 211, 11922.

Application filed. September 27, 1919. Serial no. 327,007.

To all whom it may concern:

Be it known that I, JOHN GE RGE Instr MAN, a citizen of the United States, residing at 244 E. Market Street, Bethlehem, in the countv of Northampton and State of Pennsylvania, have invented a certain new and' useful Temperature Control of Kettles by Zones, of which the following is a specification. 1

My invention relates to the heating 0 cooling of the walls of kettles and other receptacles, intended for the heat-treatment of liquids, particularly in carrying out chemical processes.

The purpose of myinvention is to provide for difi'erent applications of heating or cooling fluid throughout difierent layers, belts or zones of a kettle.

A further purpose is to provide for heating one part of a liquid under treatment, at the same time that the heat is withdrawn from another part, or that the other part thereof is cooled, so as to give differential temperatures to the several parts thereof.

Further purposes will appear in the specification and in the claims.

I have preferred to illustrate my invention by but one general form, selecting a form which is practical, efficient and inexpensive .and which at the same time well illustrates the principles of my invention.

Figure 1 is a horizontal section showing one arrangement of connections for the practice of my invention. 7

Figure 2 is a vertical broken section taken upon line 22 of Figure 1.

Figure 3 is a broken vertical section upon line 33 of Figure 1.

Figure 4 is a horizontal section showing a second arrangement of connections.

Figure 5 is a broken vertical section upon line 55 in Figure 4.

In the drawings, similar numerals indicate like parts.

In many different lines of manufacture where heat-treatment of liquids is required, it is desirable to have the heat of the liquid under complete control, and my invention is directed to rapid, simple and effective control, differentiating between difierent layers or levels of the liquid being treated.

The container 6, generically called a kettle, is provided with a plurality of passages,

fluid may be passed through ,them for the purpose of heating or cooling the walls of the kettle, and thus correspondingly heating or cooling the contents.

These several passages 7 have been arranged in groups or in belts of which I show three, at 8, 9 and 10, with separate inlets and outlets, if separate sections be used, as in Figures 1-3, or tapped at intervals to provide inlets and outlets, where the passage is continuous, as in Figures 4: and 5.

In the form shown in Figures 1-3, these belts have separate inlets 11, 12 and 13 each from either of two different sources of supply and each source valved at 14- to control the supply. The one general source of sup ply 15 is available for any of the three inlets. The other sources, 16, 17 and 18 are separate, thus providing for different temperatures of heated or superheated steam, cold water, etc. In this form there are separate outlets also, at 19, 20 and 21, valved at 14; and connecting with a main discharge pipe 22; so that any one of the single belts may be heated or cooled without afi'ecting the temperature accessible in another or others of the belts of the set.

In the form shown in Figures 4 and 5 there are three general sources of fluid supply, at 15', 15 and 15 each available for any of the inlets and ut-ofi' from them by valves 14, but only one outlet for the three belts, necessitating the use ,of the lower belt, in connection with the second or middle belt and both the lower and middle belts in conjunction with the top belt, where fluid is applied. As it is desirable, almost invariably to heat the lower part of the contents, whether the upper part is being heated or not, the single outlet form is ordinarily not objectionable, and the additional outlets of Figure 3, are not ordinarily necessary.

The general sources of supply can be suited in number and characterto the needs of the particular installation, with or without separate outlets.

When the kettle has been filled with the liquid to be treated, heating or cooling fluids can be supplied to any of the belts desired, together or with different temperatures in adjoining belts, giving great flexibility to the application of the heat-treating and cooling fluids.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1.' In a device for treating liquids, a kettle havingfluid passages in the walls thereof, and a plurality of points of inlet to and outlet from the said passages, in combination with controlled fluid supply for. the inlets whereby fluid can be passed through the passages surrounding one or more belts or zones of said kettle Without passing through the other belt or belts thereof.

2. In a device for treating liquids, a kettle having spirally arranged piping in the walls thereof, surrounding several belts-01 zones of the kettle, in combination with separate inlets for the pipingin each of said belts or zones and outlet therefor, whereby difl'erent fluids can be applied at the sametime in diflerent belts or zones.

l 3. Ina device for treating liquids, a kettle having a spirally arranged passage for'fluid in the walls thereof, divided into belts having an inlet and outlet for the passage in each belt, in combination with fluid supply for said inlets. I

4. In a device for treating liquids, a kettle having a spirally arranged passage for fluid in the .walls thereof, divided into belts havin the walls thereof, divided into belts having an outlet for the passage in each belt, in combination with separate inlets to the passages for the different belts and a-plurality ,oftemperatures of supply fluid for each of said inlets. p

6. In a device for treating liquids, a kettle having spiral paths in its walls for fluid passage, dividedinto'belts having inlets and outlets for the passages in the different belts, in combination with fluid supply at difl erent temperatures for the inlets and valve means for cutting out any inlet from any or all supply.

JOHN GEORGE LEHMAN. 

